1312621213 has 16 divisors (see below), whose sum is σ = 1423589440. Its totient is φ = 1206057600.

The previous prime is 1312621207. The next prime is 1312621223. The reversal of 1312621213 is 3121262131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312621213 - 2⁵ = 1312621181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312621223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229873 + ... + 235513.

It is an arithmetic number, because the mean of its divisors is an integer number (88974340).

Almost surely, 2^1312621213 is an apocalyptic number.

It is an amenable number.

1312621213 is a deficient number, since it is larger than the sum of its proper divisors (110968227).

1312621213 is a wasteful number, since it uses less digits than its factorization.

1312621213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028.

The product of its digits is 432, while the sum is 22.

The square root of 1312621213 is about 36230.1147251841. The cubic root of 1312621213 is about 1094.9134889918.

Adding to 1312621213 its reverse (3121262131), we get a palindrome (4433883344).

The spelling of 1312621213 in words is "one billion, three hundred twelve million, six hundred twenty-one thousand, two hundred thirteen".